<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
  <title>12_computed实现-Setter</title>
  <!-- 引入Vue -->
  <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
  <!-- 准备好一个容器-->
  <div id="demo">
    姓:<input type="text" v-model='firstName'><br>
    名:<input type="text" v-model=lastName><br>
    姓名: <span>{{getFullName}}</span>
    <button @click="changeName">修改</button>
  </div>
</body>

<script type="text/javascript">
  //阻止 vue 在启动时生成生产提示。
  Vue.config.productionTip = false;
  new Vue({
    el: '#demo',
    data: {
      firstName: 'zhang',
      lastName: 'san',
    },
    methods: {
      changeName() {
        this.getFullName = 'li-si'
      },

    },
    computed: {
      getFullName: {
        get() {
          return this.firstName.slice(0, 1).toUpperCase() + this.firstName.slice(1) + '-' + this.lastName
        },
        set(value) {
          console.log(value);
          let [a, b] = value.split('-');
          this.firstName = a
          this.lastName = b
        }
      }


      // getFullName() {
      //   return this.firstName.slice(0, 1).toUpperCase() + this.firstName.slice(1) + '-' + this.lastName
      // }
    }
  })
</script>

</html>